/*

 * Licensed to the Apache Software Foundation (ASF) under one

 * or more contributor license agreements.  See the NOTICE file

 * distributed with this work for additional information

 * regarding copyright ownership.  The ASF licenses this file

 * to you under the Apache License, Version 2.0 (the

 * "License"); you may not use this file except in compliance

 * with the License.  You may obtain a copy of the License at

 *

 *     http://www.apache.org/licenses/LICENSE-2.0

 *

 * Unless required by applicable law or agreed to in writing, software

 * distributed under the License is distributed on an "AS IS" BASIS,

 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.

 * See the License for the specific language governing permissions and

 * limitations under the License.

 */

package com.bff.gaia.unified.sdk.io.fs;



import com.bff.gaia.unified.sdk.annotations.Experimental;

import com.bff.gaia.unified.sdk.coders.AtomicCoder;

import com.bff.gaia.unified.sdk.coders.Coder;

import com.bff.gaia.unified.sdk.coders.VarLongCoder;



import java.io.IOException;

import java.io.InputStream;

import java.io.OutputStream;



/** A {@link Coder} for {@link MatchResult.Metadata} that includes {@link MatchResult.Metadata#lastModifiedMillis()}. */

@Experimental

public class MetadataCoderV2 extends AtomicCoder<MatchResult.Metadata> {

  private static final MetadataCoderV2 INSTANCE = new MetadataCoderV2();

  private static final MetadataCoder V1_CODER = MetadataCoder.of();

  private static final VarLongCoder LONG_CODER = VarLongCoder.of();



  private MetadataCoderV2() {}



  /** Returns the singleton {@link MetadataCoderV2} instance. */

  public static MetadataCoderV2 of() {

    return INSTANCE;

  }



  @Override

  public void encode(MatchResult.Metadata value, OutputStream os) throws IOException {

    V1_CODER.encode(value, os);

    LONG_CODER.encode(value.lastModifiedMillis(), os);

  }



  @Override

  public MatchResult.Metadata decode(InputStream is) throws IOException {

    MatchResult.Metadata.Builder builder = V1_CODER.decodeBuilder(is);

    long lastModifiedMillis = LONG_CODER.decode(is);

    return builder.setLastModifiedMillis(lastModifiedMillis).build();

  }



  @Override

  public boolean consistentWithEquals() {

    return true;

  }

}